Electrotinning plate quality detection device
By designing the quality detection device of electroplating tin plates, using sliding components, rotating components and detection components, the fast and accurate detection of the quality of electroplating tin plates is achieved, and the problem of low detection accuracy in the prior art is solved, and the detection efficiency and accuracy are improved.
Patent Information
- Application Number
- CN202510433389.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-06-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, the welding quality of electroplating tin plates mainly relies on manual testing, resulting in low detection accuracy and large labor consumption, so that the welding strength of electroplating tin plates cannot be effectively detected.
A quality detection device for electroplating tin plates is designed, including a detection chamber, a plating plate, a sliding assembly, a rotating assembly and a detection assembly. By placing the electroplated tin plate in the detection room by staff, the sliding components and rotating components are used to achieve rapid positioning and detection of the electroplated tin plate. The detection components detect the strength of the bends of the electroplated tin plate through pressure sensors.
It realizes rapid and accurate detection of the quality of electroplating tin plates, can effectively evaluate the strength of the bends of electroplating tin plates, reduces the dependence of manual inspection, and improves detection accuracy and efficiency.
Smart Images

Figure CN120213666A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of quality inspection of metal sheets, and more specifically, to a quality inspection device for electroplated tin plates. Background Art
[0002] Electroplated tin plate is a product with complex production technology, high technicality, long manufacturing process, high quality requirements and great manufacturing difficulty. It is obtained by electroplating pure tin on both sides of cold-rolled low-carbon thin steel plates. Electroplated tin plates not only have the characteristics of high strength, good formability, excellent corrosion resistance, strong weldability, bright appearance, etc., but also have good printing coloring properties. In addition, the tin plating layer is non-toxic. Therefore, electroplated tin plates are widely used in the food industry and various non-food industries such as making containers, stamping products, and packaging materials.
[0003] Chinese Patent Publication No.: CN221725724U discloses a quality inspection device for soldering of PCB boards, including a first vacuum generator, a sucker bracket, a vacuum sucker and a tensile sensor, aiming to solve the problems that after the soldering of existing PCB boards, the soldering quality is mainly detected manually, which consumes a large amount of manpower and has low detection accuracy. A first PCB board is arranged above the detection table, and a second PCB board is arranged on the upper surface of the first PCB board, and the second PCB board is soldered to the first PCB board. A plurality of contacts are arranged on the surface of the second PCB board; a bracket is installed at the four corners of the upper end of the detection table, a top plate is installed at the upper end of the bracket, an electric push rod is installed at the upper end of the top plate, and the output end of the electric push rod penetrates and extends to the lower end of the top plate and is installed with a pulling and adsorbing mechanism.
[0004] Although the above patent uses components such as a first vacuum generator, a sucker bracket, a vacuum sucker and a tensile sensor to detect the soldering strength of two stacked plates, considering the strong weldability of electroplated tin plates themselves, the welding combinations between electroplated tin plates are frequent and the welding strength between them needs to be detected to ensure that no other unexpected situations occur during their subsequent use.
[0005] In view of this, we propose a quality inspection device for electroplated tin plates. Summary of the Invention
[0006] The purpose of the present invention is to provide a quality inspection device for electroplated tin plates to solve the problems raised in the above background art.
[0007] To achieve the above object, the present invention provides a quality detection device for electroplated tin plates, including a detection chamber. The bottom sides of both sides of the detection chamber are slidably connected with placement plates. On the tops of both placement plates, there is a sliding assembly for positioning the plates. An entrance is opened on one side of the detection chamber. The top of the detection chamber is detachably connected with a top cover. A slope is opened on the inner wall at the lower end of the side of the detection chamber far from the entrance. A pressure sensor is fixedly connected to the slope. The inner sides of both sides of the detection chamber are slidably connected with side plates. An electric slide rail is fixedly connected to the inner wall of the detection chamber near the entrance. On the inner sides of both side plates, there is a detection assembly for detection. On the outer side of the detection assembly, there is a rotating assembly.
[0008] As a preference of the present invention, the sliding assembly includes a sliding rod. A first strip-shaped hole is horizontally opened on the outer wall of the sliding rod. The bottom of the sliding rod is slidably connected with a first slider. The first slider is slidably connected to the top of the placement plate. A blocking piece is fixedly connected to the end of the sliding rod far from the entrance.
[0009] As a preference of the present invention, the rotating assembly includes a motor. The output end of the motor is fixedly connected with a first turntable. A limiting disc is fixedly connected to the side of the first turntable far from the first turntable. A raised block is fixedly connected to the peripheral position of the first turntable near the limiting disc.
[0010] As a preference of the present invention, a second turntable is arranged on one side of the first turntable. A plurality of arched holes are annularly arrayed on the outer wall of the second turntable. The diameter of the raised block is matched with the width of the arched hole. The raised block is slidably connected in the arched hole. A first rotating rod is fixedly connected to the central position of the second turntable.
[0011] As a preference of the present invention, the detection assembly includes a fixing plate. The fixing plate is located inside the side plate. A fixing frame is arranged on the side of the fixing plate far from the side plate. The fixing plate, the side plate and the fixing frame are fixedly connected by a cross column passing through the fixing plate. The fixing frame is integrally in the shape of the letter 'L'.
[0012] As a preference of the present invention, the fixing frame is slidably connected to the electric slide rail. A strip-shaped groove is opened on the side of the fixing frame far from the fixing plate. A slide rail is fixedly connected to one end of the fixing frame. The slide rail is perpendicularly distributed with the fixing frame. An extension plate is fixedly connected to the outer wall on one side at the lower end of the slide rail. The extension plate is slidably connected in the first strip-shaped hole.
[0013] As a preference of the present invention, a sliding strip is slidably connected to the track of the slide rail. A second strip-shaped hole is opened on the outer wall of the sliding strip. A fixing column is fixedly connected to the side of the fixing frame far from the slide rail. The first rotating rod is rotatably connected through the fixing column.
[0014] Preferably in the present invention, the detection component further includes a first gear, which is located between the fixed frame and the sliding bar. A second slider is rotatably connected to the peripheral position of the first gear on the side away from the fixed frame. The second slider is slidably connected in the second strip-shaped hole. An extension column is fixedly connected to the side of the second slider away from the first gear. A hydraulic rod is fixedly connected to the bottom of the extension column. A pressure plate is fixedly connected to the end of the hydraulic rod away from the extension column, where:
[0015] At the center position of the first gear on the side away from the second slider, a sliding member is fixedly connected through a cross column, and the sliding member is slidably connected in the strip-shaped groove.
[0016] Preferably in the present invention, a second gear is meshed with one side of the first gear. The second gear is connected to the end of the first rotating rod away from the second turntable, and the first rotating rod is fixedly connected to the peripheral position of the second gear. A connecting rod is rotatably connected to the outer wall of the cross column of the first gear, and the end of the connecting rod away from the first gear is rotatably connected to one side of the second gear.
[0017] Preferably in the present invention, stepped grooves are provided on the inner sides of the two second gears. A second rotating rod is fixedly connected in the stepped grooves. A detection column is fixedly connected to the outer wall of the second rotating rod, and the detection column is in the shape of a square column as a whole.
[0018] Compared with the prior art, the beneficial effects of the present invention are:
[0019] 1. In this electroplated tinplate quality detection device, the staff pulls out the placement plate to place and convey the electroplated tinplate into the detection chamber. During the conveying process, the blocking piece will be fixed under the influence of the buckle in the second strip-shaped hole, so as to quickly position the electroplated tinplate.
[0020] 2. In this electroplated tinplate quality detection device, the second gear in the detection component is driven to rotate through the rotation component, and the detection column is driven to push the bent surface of the electroplated tinplate to make it slightly bent and transmit the force to the pressure sensor to detect whether it is qualified, which can detect the strength of the bent part of the electroplated tinplate.
[0021] 3. In this electroplated tinplate quality detection device, after the second gear rotates one circle, the first gear will rotate half a circle to rotate the extension column, the hydraulic rod and the pressure plate together from the upper end position of the first gear to the lower end position. At this time, the pressure plate will press down and fix the flat part of the electroplated tinplate to prevent the electroplated tinplate from warping due to force when detecting the bent position. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is an overall three-dimensional schematic diagram of the electroplated tinplate quality detection device of the present invention;
[0023] Figure 2Schematic cross-sectional view of the edge of the detection chamber of the tin-plated steel sheet quality detection device of the present invention;
[0024] Figure 3 Schematic three-dimensional view of the interior of the detection chamber of the tin-plated steel sheet quality detection device of the present invention with the top cover removed;
[0025] Figure 4 Schematic three-dimensional view of the interior of the tin-plated steel sheet quality detection device of the present invention;
[0026] Figure 5 Schematic three-dimensional view of the detection component of the tin-plated steel sheet quality detection device of the present invention;
[0027] Figure 6 Schematic three-dimensional view of the unfolded detection component of the tin-plated steel sheet quality detection device of the present invention;
[0028] Figure 7 Schematic three-dimensional view of the unfolded rotation component of the tin-plated steel sheet quality detection device of the present invention;
[0029] Figure 8 Schematic three-dimensional view of the unfolded fixing frame of the tin-plated steel sheet quality detection device of the present invention
[0030] The meanings of each label in the figure are as follows:
[0031] 1. Detection chamber; 11. Placing plate; 12. Entrance; 13. Top cover; 14. Slope; 15. Pressure sensor; 16. Side plate; 17. Electric slide rail; 2. Sliding component; 21. Sliding rod; 211. First strip-shaped hole; 212. First slider; 22. Blocking piece; 3. Rotation component; 31. Motor; 32. First turntable; 321. Limiting disc; 322. Protruding block; 33. Second turntable; 331. Arch-shaped hole; 332. First rotating rod;
[0032] 4. Detection component; 41. Fixed plate; 42. Fixing frame; 421. Strip-shaped groove; 422. Slide rail; 4221. Extension plate; 423. Sliding strip; 4231. Second strip-shaped hole; 424. Fixed column; 43. First gear; 431. Second slider; 432. Extension column; 4321. Hydraulic rod; 4322. Pressing disc; 44. Second gear; 441. Step groove; 45. Connecting rod; 5. Second rotating rod; 51. Detection column. Detailed implementation manners
[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0035] Embodiment 1
[0036] Please refer to Figures 1-8 As shown in the figure, this embodiment provides a quality detection device for electroplated tin plates, including a detection chamber 1. The bottom of both sides of the detection chamber 1 is slidably connected with a placement plate 11. A sliding component 2 for positioning the plate is arranged on the top of both placement plates 11. An entrance 12 is opened on one side of the detection chamber 1. The top cover 13 of the detection chamber 1 is detachably connected. A slope 14 is opened on the inner wall of the lower end of the detection chamber 1 on the side far from the entrance 12. A pressure sensor 15 is fixedly connected to the slope 14. Side plates 16 are slidably connected inside both sides of the detection chamber 1. An electric slide rail 17 is fixedly connected to the inner wall of the detection chamber 1 on the side close to the entrance 12. A detection component 4 for detection is arranged inside both side plates 16. A rotating component 3 is arranged outside the detection component 4.
[0037] As Figure 5 shown in the figure, the sliding component 2 includes a sliding rod 21. A first strip-shaped hole 211 is horizontally opened on the outer wall of the sliding rod 21. A first slider 212 is slidably connected to the bottom of the sliding rod 21. The first slider 212 is slidably connected to the top of the placement plate 11. A blocking piece 22 is fixedly connected to the end of the sliding rod 21 far from the entrance 12.
[0038] As Figures 7-8 shown in the figure, the rotating component 3 includes a motor 31. The output end of the motor 31 is fixedly connected with a first turntable 32. A limiting disk 321 is fixedly connected to the side of the first turntable 32 far from the first turntable 32. A raised block 322 is fixedly connected to the peripheral position of the first turntable 32 on the side close to the limiting disk 321. A second turntable 33 is arranged on one side of the first turntable 32. A plurality of arched holes 331 are annularly arranged on the outer wall of the second turntable 33. The diameter of the raised block 322 is in line with the width of the arched hole 331. The raised block 322 is slidably connected in the arched hole 331. A first rotating rod 332 is fixedly connected to the central position of the second turntable 33.
[0039] As Figure 6As shown in the figure, the detection component 4 includes a fixing plate 41. The fixing plate 41 is located inside the side plate 16. A fixing frame 42 is arranged on the side of the fixing plate 41 away from the side plate 16. The fixing plate 41, the side plate 16 and the fixing frame 42 are fixedly connected by a cross column passing through the fixing plate 41. The fixing frame 42 is in an overall L shape. The fixing frame 42 is slidably connected to the electric slide rail 17. A strip-shaped groove 421 is formed on the side of the fixing frame 42 away from the fixing plate 41. One end of the fixing frame 42 is fixedly connected to a slide rail 422. The slide rail 422 is perpendicularly distributed to the fixing frame 42. An extension plate 4221 is fixedly connected to the outer wall of one side of the lower end of the slide rail 422. The extension plate 4221 is slidably connected in the first strip-shaped hole 211. A slide bar 423 is slidably connected to the track of the slide rail 422. A second strip-shaped hole 4231 is formed on the outer wall of the slide bar 423. A fixing column 424 is fixedly connected to the side of the fixing frame 42 away from the slide rail 422. The first rotating rod 332 is rotatably connected through the fixing column 424.
[0040] As Figures 4-6 shown in the figure, the detection component 4 further includes a first gear 43. The first gear 43 is located between the fixing frame 42 and the slide bar 423. A second slider 431 is rotatably connected to the peripheral position on the side of the first gear 43 away from the fixing frame 42. The second slider 431 is slidably connected in the second strip-shaped hole 4231. An extension column 432 is fixedly connected to the side of the second slider 431 away from the first gear 43. A hydraulic rod 4321 is fixedly connected to the bottom of the extension column 432. A pressure plate 4322 is fixedly connected to the end of the hydraulic rod 4321 away from the extension column 432. Among them: a sliding member is fixedly connected to the central position on the side of the first gear 43 away from the second slider 431 through a cross column. The sliding member is slidably connected in the strip-shaped groove 421. A second gear 44 is meshed with one side of the first gear 43. The second gear 44 is connected to the end of the first rotating rod 332 away from the second turntable 33. And the first rotating rod 332 is fixedly connected to the peripheral position of the second gear 44. A connecting rod 45 is rotatably connected to the outer wall of the cross column of the first gear 43. The end of the connecting rod 45 away from the first gear 43 is rotatably connected to one side of the second gear 44. Step-shaped grooves 441 are formed inside the two second gears 44. A second rotating rod 5 is fixedly connected in the step-shaped grooves 441. A detection column 51 is fixedly connected to the outer wall of the second rotating rod 5. The detection column 51 is in an overall square column shape;
[0041] Among them: the circumference of the first gear 43 is twice the circumference of the second gear 44.
[0042] It can be seen from this that when it is necessary to detect the quality of electroplated tin plates, as Figures 4-8As shown in the figure, in the preparation stage, the welded L-shaped electroplated tin plate is prepared. Then, the staff pulls out the two-sided placement plates 11 from the entrance 12, places the L-shaped electroplated tin plate flat on the two-sided placement plates 11, and then pushes the placement plates 11 into the detection chamber 1 to start the detection. It should be noted here that when the staff pulls out the placement plates 11, the maximum extent that can be pulled out is when the blocking piece 22 reaches the position on one side of the first gear 43. When the staff places the electroplated tin plate on the placement plates 11 and pushes it into the detection chamber 1, the outer wall of the electroplated tin plate will abut against one side of the blocking piece 22 and slide towards the inside of the detection chamber 1 together with the sliding bar 423 until the extension plate 4221 slides to the end position of the sliding bar 423 away from the blocking piece 22 and stops. At this time, the blocking piece 22 will be fixed under the influence of the buckle in the second strip-shaped hole 4231, so as to quickly position the electroplated tin plate. At this time, the bent position of the electroplated tin plate is at the slope 14 position;
[0043] At this time, driven by the motor 31, the first turntable 32 rotates. During the rotation of the first turntable 32, the raised block 322 will rotate together. When the raised block 322 rotates into the arched hole 331, it will drive the second turntable 33 to rotate together. And every time the raised block 322 rotates one circle, it will slide once in the arched hole 331 and drive the second turntable 33 to rotate 90 degrees. At the same time, when the second turntable 33 rotates 90 degrees, it will drive the second gear 44 to rotate 90 degrees at the same time. And the rotation of the second gear 44 is a non-centered rotation. So during the rotation of the second gear 44, it will move annularly to one side. At this time, under the restriction of the connecting rod 45, the rotation of the second gear 44 will also drive the first gear 43 to rotate. And because the circumference of the first gear 43 is twice that of the second gear 44, so every time the second gear 44 rotates one circle, the first gear 43 rotates half a circle. At this time, when the second gear 44 rotates one circle, it will drive the detection column 51 to move annularly one circle towards the bent position of the electroplated tin plate. When the detection column 51 moves to the bent surface of the electroplated tin plate, the detection column 51 will push the bent surface of the electroplated tin plate towards the direction of the pressure sensor 15. At this time, the bent surface of the electroplated tin plate will bend slightly towards the direction of the pressure sensor 15. At this time, the pressure sensor 15 is squeezed by the electroplated tin plate, and after obtaining the value of the force it can withstand, it is transmitted to the console to detect whether this value is within the lowest threshold value. If it is higher than the highest threshold value, it means that the quality of the electroplated tin plate is unqualified. If it is within the threshold range, it means it is qualified. Because the movement trajectory of the detection column 51 is the same, that is, the force on the electroplated tin plate is also the same. Then when detecting the same type of electroplated tin plate, the smaller the force, the smaller the bending degree of the electroplated tin plate against the detection column 51 under the force. This means that when it is detected that this force is higher than the threshold, it indicates that the force that the electroplated tin plate can withstand bending is smaller. This enables the detection of the strength of the bent part of the electroplated tin plate after welding during the detection process to ensure whether there are problems with its quality;
[0044] It should be noted that after the second gear 44 rotates one full circle, the first gear 43 will rotate half a circle to rotate the extension post 432, the hydraulic rod 4321 and the pressing plate 4322 together from the upper end position of the first gear 43 to the lower end position. At this time, the pressing plate 4322 will press down and fix the flat part of the electroplated tin plate to prevent the electroplated tin plate from warping due to force when detecting the bending position.
[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A tinplate quality inspection device, comprising an inspection chamber (1), characterized in that: The bottom of both sides of the detection chamber (1) are slidably connected to placement plates (11), and the tops of the placement plates (11) on both sides are provided with sliding components (2) for positioning plates. An entrance (12) is provided on one side of the detection chamber (1), and a top cover (13) is detachably connected to the top of the detection chamber (1). A slope (14) is provided on the inner wall of the lower end of the detection chamber (1) on a side away from the entrance (12), and a pressure sensor (15) is fixedly connected to the slope (14). Side plates (16) are slidably connected to the inside of the detection chamber (1), and an electric slide rail (17) is fixedly connected to the inner wall of the detection chamber (1) on a side close to the entrance (12). Detection components (4) for detection are provided on the inner sides of the side plates (16) on both sides, and a rotating component (3) is provided on the outer side of the detection component (4).
2. The tinplate quality detection device according to claim 1, characterized in that: The sliding assembly (2) comprises a sliding rod (21), an outer wall of the sliding rod (21) having a first strip hole (211) in a horizontal direction, a bottom of the sliding rod (21) being slidably connected to a first slider (212), the first slider (212) being slidably connected to the top of the placement plate (11), and a blocking sheet (22) being fixedly connected to the end of the sliding rod (21) away from the entrance (12).
3. The tinplate quality detection device according to claim 1, characterized in that: The rotating assembly (3) comprises a motor (31), the output end of the motor (31) being fixedly connected to a first turntable (32), the first turntable (32) being fixedly connected to a limiting disk (321) at a side away from the first turntable (32), and the first turntable (32) being fixedly connected to a protruding block (322) at a peripheral position on a side close to the limiting disk (321).
4. The tinplate quality detection device according to claim 3 is characterized in that: A second turntable (33) is arranged on one side of the first turntable (32); a plurality of arched holes (331) are formed in a circular array on the outer wall of the second turntable (33); the diameter of the protruding block (322) matches the width of the arched hole (331); the protruding block (322) is slidably connected in the arched hole (331); and a first turnbar (332) is fixedly connected at the center of the second turntable (33).
5. The tinplate quality detection device according to claim 4, characterized in that: The detection assembly (4) comprises a fixing plate (41), the fixing plate (41) being located on the inner side of the side plate (16), a fixing frame (42) being provided on the side of the fixing plate (41) away from the side plate (16), the fixing plate (41), the side plate (16) and the fixing frame (42) being fixedly connected via a transverse column penetrating the fixing plate (41), and the fixing frame (42) being in the shape of the letter L as a whole.
6. The tinplate quality detection device according to claim 5, characterized in that: The fixing frame (42) is slidably connected to the electric slide rail (17); a strip groove (421) is provided on a side of the fixing frame (42) away from the fixing plate (41); one end of the fixing frame (42) is fixedly connected to the slide rail (422); the slide rail (422) and the fixing frame (42) are vertically distributed; an extension plate (4221) is fixedly connected to an outer wall of one side of the lower end of the slide rail (422); and the extension plate (4221) is slidably connected to the first strip hole (211).
7. The tinplate quality detection device according to claim 6, characterized in that: A sliding bar (423) is slidably connected to the track of the sliding rail (422), and a second bar-shaped hole (4231) is opened on the outer wall of the sliding bar (423). A fixing column (424) is fixedly connected to the fixing frame (42) at a side away from the sliding rail (422), and the first rotating rod (332) is rotatably connected to the fixing column (424).
8. The tinplate quality detection device according to claim 7, characterized in that: The detection assembly (4) further comprises a first gear (43), the first gear (43) being located between the fixed frame (42) and the sliding bar (423), the first gear (43) being rotatably connected to a second slider (431) at a peripheral position on a side away from the fixed frame (42), the second slider (431) being slidably connected in a second bar-shaped hole (4231), the second slider (431) being fixedly connected to an extension column (432) on a side away from the first gear (43), the bottom of the extension column (432) being fixedly connected to a hydraulic rod (4321), and the hydraulic rod (4321) being fixedly connected to a pressure plate (4322) at one end away from the extension column (432), wherein: The first gear (43) is fixedly connected to a sliding member via a transverse column at a center position of a side away from the second slider (431), and the sliding member is slidably connected in the strip groove (421).
9. The tinplate quality detection device according to claim 8, characterized in that: One side of the first gear (43) is meshedly connected with a second gear (44); the second gear (44) is connected to an end of a first rotating rod (332) away from the second rotating disk (33); the first rotating rod (332) is fixedly connected to a peripheral position of the second gear (44); the first gear (43) is rotatably connected to a connecting rod (45) on the outer wall of the horizontal column; the connecting rod (45) is rotatably connected to one side of the second gear (44) at an end away from the first gear (43).
10. The tinplate quality detection device according to claim 9, characterized in that: The inner sides of the second gear (44) on both sides are provided with stepped grooves (441), a second rotating rod (5) is fixedly connected in the stepped grooves (441), and a detection column (51) is fixedly connected to the outer wall of the second rotating rod (5), and the detection column (51) is in the shape of a square column as a whole.
Citation Information
Patent Citations
PCB soldering tin quality detection device
CN221725724U